The specific relationships between the epifauna and the meiofauna were studied by means of a cage experiment in a mangrove swamp with a Ceriops tagal and Avicennia marina vegetation located at Gazi Bay (Kenya). The experimental setup consists of three cages, three half cages and three blanco’s (surface 1 m^2). All epifauna was removed in the cages in order to study the effects of epifaunal exclusion. Sampling occurred every five days during one month.